Dex to Java decompiler
IntelliJ IDEA & IntelliJ Platform
Apache NetBeans
Now continued as OculiX — see oculix.org
GmsCore fork for ReVanced with Material You, features and improvements
The modern Java bytecode editor
SoapUI is a free and open source cross-platform functional testing
Easily create Spring-powered, production-grade applications
The OWASP ZAP core project
Apache Maven core
Flexible, lightweight multi-language test reporting tool
Autopsy® is a digital forensics platform and graphical interface
A reference implementation of a JSON package in Java
Programmer-friendly testing framework for Java and the JVM
Library to stream in rtmp and rtsp for Android. All code in Java
The modern Essentials suite for Spigot and Paper
A Java serialization/deserialization library to convert Java Objects
Continuous inspection
Build great things at any scale
A reverse engineering suite (decompiler, editor, debugger and more)
A tool for reverse engineering Android apk files
Decompiler from Java bytecode to Java, used in IntelliJ IDEA
A library for communication with a Minecraft client/server
A powerful text/code editor for Android
AnLinux allow you to run Linux on Android without root access